I forgot to mention that Dennis Carpenter makes the special carriage fender bolts, exact-as-original, as part number 355310-KIT SEE LINK BELOW. Original carriage bolts were 5/8-18 NF x 6.12" L so these should work with stabilizer brackets and keep tractor original. Original hex head bolts were 5-9/16" long so I'm thinking these carriage bolts may work fine. You may want to call and ask first or call Derek at Just8Ns as he knows for sure and they sell the DC parts as well. The DC kit includes 4 of each : special carriage bolts; 5/8 Lockwashers; and 5/8-18 Hex Nuts. HTH...